Backend

The OPNsense backend consists of several components (see Architecture for a full stack description).

Our core backend service (configd) is implemented using Python. and provides two main features:

• Service interaction (using configd actions)

• Generation of configuration data (using templates)

Because we need integration between (legacy) components, we provide additional plugin options for the following components:

• Services (the services status)

• Syslog (define syslog targets)

• Interface (register interfaces, firewall use etc.)

• Service configuration (legacy service configuration, new style uses configd templates)

Services which need to be executed at system startup can use rc(8) or our syshook system. Our overview document contains a practical write up to explain the various phases of operation and hooks available in them.

• Overview
• Bootup / autorun options
• CARP status
• Using configd
• Using plugins
• Using Templates